CALL: ELECTRIC_FIELD


coordinates

  This procedure accepts input arguments of types Number and Matrix.

  If at least one of the input arguments x and y is of type Matrix,
  then all output arguments are of type Matrix, with the dimensions
  of the first input argument of type Matrix. If one input argument
  is of type Number and the other of type Matrix, then the Number
  type argument is "expanded" to become a Matrix filled uniformly
  with the value of the Number.

  The coordinates system expected by ELECTRIC_FIELD is the internal
  frame. If you describe your cell in Cartesian coordinates, then
  the internal frame is simply the Cartesian coordinate system. If
  polar coordinates are used however, then you should supply the
  following parameters:

  for x: log(r)
  for y: phi, in radians

field

  The field is returned in internal coordinates. The internal
  coordinates system is Cartesian when the cell is described in
  Cartesian coordinates, but when you describe the cell in polar
  coordinates, you've to apply the following mapping:

  Er = Ex/r
  Ephi = Ey/r

  Ez is invariant under this mapping.

status

  Indicates where the point is located, if only scalar arguments are used
  as coordinates, then the status is returned in the form of a string. If
  at least one coordinate is a Matrix, then a matrix filled with numeric
  location codes is returned.

  -------------------------------------------------------------------------
  Status              Location                                         Code
  -------------------------------------------------------------------------
  In a material       Inside the mesh, but not in a drift medium         -5
  In an X wire        Inside a wire of type X                           > 0
  Normal              In the active part of the cell                      0
  Outside mesh        Not in any mesh triangle or tetrahedron            -6
  Outside plane       On the side of a plane where no wires are    -4 to -1
  Unknown potential   Unknown potential type (shouldn't occur)          -10
  Unknown             Other cases (shouldn't occur)                   other
  -------------------------------------------------------------------------

Keyword index. Formatted on 10/11/98.